Bosh plate



1. SMITH.

BOSH PL'ATE.

APPLICATION FILED MAR, 26. 1920.

Patented Nov. 7, 1922.

Patented Nov. "7!, 3922.

1 UNITED srarss PATENT orrics.

JAMES SMITH, OF CHICAGO, ILLINOIS, ASSIGNOR TO NEW PROCESS COPPER CASTINGS- CQMPANY, OF PITTSBURGH, PENNSYLVANIA, A COMPANY OF DELAWARE.

BUSH PLATE.

7'0 all "ac/1.0m it may concern Be it known that 1, JAMES SMITH, a citizen of the United States, and residing in the city of Chicago, in the county of Cook and State of Illinois, have invented or discovered new, useful, and Improved Bosh Plate, of which the following is a speoifica non.

My invention consists in certain new and useful improvements in bosh plates for blast-:lt'urnaces and the like.

My object is to provide a strong, durable but inexpensive bosh plate free from interior anchors, studs or other supports or obstruction, permitting the free, uninterrupted How of the cooling medium; which will not buckle, collapse, or spread under pressure, and which may be easily insertedinto and withdrawn from the brick work of the bosh without sticking.

On July 2nd, 1912, there were issued to me Letters Patent of the United States Nos. 1031388 and 1031389, wherein are shown bosh plates provided with a central vertical well open at the top and bottom and across which the water inlet pipe extends from the butt to the nose of the bosh plate. In practice I have found that there is a tendellcy for the bricks of the bosh or fragments thereof to drop or extend down into said well. thus locking the bosh plate in its position in the bosh and making it almost impossible to withdraw the plate. There is also danger of injury to the water inlet pipe from the same source.

In my Letters Patent of the United States No. 1031389, the water inlet pipe extends through a depression or trough in the top wall of the plate at the butt, thereby likewise exposing the pipe to injury.

My present invention avoids these objeciionabl e features.

Thus, the center of the bosh late is provided with an upwardly extending recess, instead of an open ended well, the bottom of the recess being open through the bottom wall of the bosh plate while the top of the recess is closed over by the continuation of the top wall of the bosh plate. Therefore no dropping or protrusion of the brick the butt of the plate.

work of the bosh into the said central aperture is possible. and the bosh plate cannot become so tightly wedged in the bosh as to render its removal difficult.

Again, the water inlet pipe is led through the butt of the bosh plate by means of an upwardly curved trough in the bottom wall of the bosh plate, thus better protecting the said pipe from injury and enabling the bosh plate to present a smoothuninterrupted surface to the superimposed brick work, thereby insuring the easy and quick removal of the bosh plate. Said trough extending upwardly into said late also has the strength and resisting power of an arch, rather than a source of weakness, as in my Letters Patent 1031489.

Again in my patented bosh plates I provide a boss on the inner face of the nose wall in front of thenozzle of the water inlet pipe to receive the impact of the entering water and divert the same laterally to pass in two currents in opposite directions along the nose wall and thence rearwardly toward In my present improvement I have done away with said boss and form the nose wall of the plate of substantially the same thickness for its full extent and thus enabling me to form the walls of the plate of substantially constant thickness, thus avoiding the danger of uneven expansion under heat.

Other novel features of construction and arrangement of parts will appear from the :t'ollowing description,

In the accompanying drawings, Fig. l is a top plan view of my improved bosh plate, the walls of the central aperture and of the trough in the bottom wall, the baffles and the water inlet pipe being shown in dotted lines; Fig. 2 is a butt end View of the bosh plate: Fig. 3 is a sectional view taken along the line IIIIII in Fig. 1, and Fig. 4 is a bottom plan view of the bosh plate on reduced scale.

The following is a detailed of the drawings.

A is the bosh plate having a nose wall 1; a butt wall 2; side walls 3; top wall 4, and bottom wall 5. The plate is preferably description arched both at top and bottom laterally and tapered toward the rear both vertically and horizontally to add strength and to facilitate its insertion into and removal from the furnace bosh. The lateral arching is shown in Fig. 2, while the tapering is shown in Figs. 1, 8 and 4:.

The central interior of the plate is interrupted and occupied by the walled recess B whose bottom is open through the bottom wall 5 of the bosh late, while its upper end is closed by the top wall 4 of the bosh plate which is continuous. The sides of the recess are defined and enclosed by theend walls 6 and 7, and the side walls 8 and 9 extending from the bottom wall 5 and merging into the continuous top wall 4.

C is an upwardly extending trough in the bottom wall 5 crossing the plate from its butt to the front of the recess B. Said trough does not extend up to the top wall 4 of the plate but there is left between the highest pointof the trough and the said wall 4, a cross passage 10 for the circulation of water along the inside of the butt wall of the bosh plate. The front wall 6 of the recess B is provided with a threaded hole 11 alined with the trough C and with the center of the nose wall 1 of the bosh plate.

D is a water inlet pipe, connected to the pressure or service pipe, not shown, and screwed into the hole 11 with its end preferably extending to a point adjacent to the noseoj? the plate, so that the entering water will impinge against said nose wall and, dividing, flow to either side, being directed by the wing-baffles 12 extending from the angles otthe walls 7 and 8, and 7 and 9 toward the front corners oi the plate, said battles being integral with said corners and with the top and bottom walls of the bosh plate. Sufiicient space is left between the ends of the battles and the nose wall of the plate for lateral escape of the water in two oppositely flowing currents, the water flowing around the ends of the baitles and thence rearwardly between the side walls of the plate and-the side walls of the recess B, the butt wall of the plate being provided with threaded ports for carrying oil the used water. Thus near its ends said butt wall is provided with threaded ports 13 and nearer the center with threaded ports 14-, enabling the waste to be connected up to suit the particular furnace practice. The unused ports may be closed by means ot the usual threaded plugs.

I prefer to omit the usual handles on the butt'ot the plate for withdrawing the latter, finding that it is more satisfactory to insert a hook through the trough l0 and engage it with the wall of the recess B for pulling the plates.

It is evident from the foregoing that my improved bosh plate presents an uninterrupted interior for the free circulation of the currents of the cooling medium, the interior of the plate being free from unnecessary obstructions, liable to result in clogging. The doubled arched and tapered form of the plate greatly facilitates its insertion into and removal from the furnace bosh, and also adds to the strength of the plate. The walls of the recess 13 support the intermediate por- ,tions of the plate preventing collapse or rupture resulting trom exterior or interior pressure. The extension of the top wall of the bosh plate continuously over and closing the top of the recess B prevents portions of the brick workdroppin-g or protruding into said recess, thus interfering with the tree removal of the plate The location of the trough entrance tor the water inlet pipe through the bottom instead of the top of the plate also prevents such interference on the part of the brickwork, and makes the top of the plate smooth and uninterrupted. The extension of the top wall of the plate continuously across the recess B, closing the upper end of the plate has the additional and very important function of tying the front, rear and side portions of the-plate together, thus rendering impossible longitudinal or lateral spreading of the plate under excessive pressure, as might result were the plate in the form of ahollow square such as in my said Letters Patent. I thus have in my new bosh plate, a much stronger and more rigid bosh plate than in the case of my previous inventions. The arch forthe water pipe being below, instead of on top, acts as a strengthening arch forthe buttot' said plate, instead of a source of weakness as it would be if in the form of a depression in the top wall of the plate.

that I desire to claim is 1. An integrally cast bosh plate characterized by a water passage along the nose of the plate, a parallel water passage along the butt of the plate, a waterpassage along each side of the plate connecting together the ends 110 01. said nose and butt passages, a central walled recess extending up through the bottom wall ofthe bosh plate, the side walls of said recess forming the inner walls of saidwater passages, and the upper end of said 115 recess being closed by the continuous top wall of said plate, a water inlet pipe extending across said recess to said nose passage, the butt portion of said plate being provided with a. walled aperture to provide clearance 120 for said pipe, and means for the discharge of the heated water from said butt passage.

9.. An integrall cast bosh plate characterized by a water passage along the nose of the plate, a parallel water passage along the butt 125 ofthe plate, a water passage along each side of the plate connecting together the ends of said nose andbutt passages, a central walled recess extending up through the bottom wall of the bosh plate, the side walls of said rc- 130 (less forming the inner Walls of said Water passages, and the upper end of said recess lowering closed by the continuous top wall of said plate, a Waiter-inlet pipe extending across said recess to said nose passage, the

butt portion of said plate being provided with en upwardly arched groove to provide JAMES SMITH. 

